" there were a couple of
Marantz models (Model 140, 2275) which used Motorola (in-house numbered)
output devices. They appeared to be similar to the MJ15003/4."

Alot of Marantz buyers were aware of the change. They did not want to se "2S___" on the output transistors. Made them think they were getting a Sun Valley Marantz, not a Chatsworth Marantz.